Exhaust insert



FIG. 1 is a top view of an exhaust insert showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a bottom view of thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front end view thereof;

FIG. 6 is a rear end view thereof; and,

FIG. 7 is a perspective view of the exhaust insert as installed in anexhaust muffler;

The broken-lines of the exhaust insert or of the exhaust muffler form nopart of the claimed design.

I claim the ornamental design for an exhaust insert, as shown anddescribed.